Controlling valves and system embodying the same



June 6, 1933.

F. w. ROBERTSHAW ET-AL CONTROLLING VALVES AND SYSTEM EMBODYING THE SAME Original Filed March 24, 1926 4 Sheets-Sheet l June 6, 1933- F. w. ROBERTSHAW ET AL 1,912,727

CONTROLLING VALVES AND SYSTEM EMBODYING. THE SAME Original Filed March 24, 1926 4 Sheets-Sheet 2 June 6, 1933 F. w, ROBERTSHAW ET AL 1,912,727

CONTROLLING VALVES AND SYSTEM EMBODYING THE SAME Original Filed March 24, 1926 4 Sheets-Sheet 3 Qmcn Ho'r

Momma June 6, 1933. F. w. ROBERTSHAW ET AL 1,912,727

CONTRQLLING VALVES AND SYSTEM EMBODYiNG THE SAME Original Filed March 24, 1926 4 Sheets-Sheet 4 u hJ/mi mi uhhhhhhMm 44 Patented June 6, 1933 UNITED s'l'n'ras PATENT OFFICE FREDERICK W. BOBEBTSHAW, OI PITTSBURGH, AND GEORGE A. BOBEBT SHAW, OF

GREENSBORO, PENNSYLVANIA, ASSIGNORS TO ROBER'ISHAW THERMOSTAT COH- IANY, OF YOUNGWOOD, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA CONTROLLING VALVES AND SYSTEM EMBODYING THE SAME Original application illed larch 24, 1926, Serial No. 98,977. Divided and this application filed November 80, 1828. Serial No. 822,828.

The present invention relates broadly to the artlof'burner systems and control valves therefor, and more particularly to an improved thermostatic control valve and oven system in which the same is embodied.

At the present'time it'is customary in the general art to which the present invention relates to utilize thermostatic control valves on domestic ovens. In some cases the entire structureis positioned within the oven so that it is necessary to open the door to control the same,- while in other cases the thermostatic element is projected into the oven through one of the walls thereof with the valve casing and the piping exteriorly positioned with respect to the oven.

While "both of the above types of installations possess features of merit, it has been found to be highly desirable to provide a form of control which may be applied to any oven after all of the piping is in position, and in which all of the parts, with the exception of the control casing, are concealed by the oven. In accordance with the present invention such an improved type of control and installation is made possible.

' thermostatic valvemay be quickl applied,

,Other objects of the present invention are to provide amore attractive oven structure by reason of the concealed gas pipes, and to provide an installation in which the removed or replaced as may be esired,

Still another object of th e present invention is to provide a control installation of such character that linings within the oven can be easily replaced without the necessity of a special lining structure as required in casings'where difiiculty is encountered in the removal of the thermostat.

In the accompanying drawings there are shown for purposes of illustration only, certain preferred embodiments of theflpresent invention, it being understood that the drawings do not define the limits of our in-] vention, as changes in the construction and operation disclosed therein may be made without departing either from the spirit of the invention or the scope of our broader claims. v

shown in Figures 1 and 2;

Figure 4 is a perspective view, partly broken away, of the improved control'shown in Figures 1 and 3'; V

. Figure 4* is a plan view showing a form of cover plateadaptable for use with the construction of Figure 4; I

Figure 5 is a view similar to Figure 4 showing a slightly modified form of control with union connections;

Figure 6 is a rear elevation of the valvecasing; i

Figure 7 is a vertical sectional view on v the line VIIVII of Figure 6 looking in the direction of the arrows;

Figure 8 is a transverse sectional view on the line VIII-VIII of Figure 7 looking in the direction of the arrows;

Figure 9 is a front elevation of a special double L fitting;

Figure 10 is a bottom fitting of Figure 9;

Figure 11 is a longitudinal sectional view end view of the through a form of nipple suitable for use with the control structure of Figures 4 and 6 to 10, both inclusive;

Figure 12 is a perspective view illustratin a modified form of connection; and

igure 13 is a detail sectional view illusv ,trating in detail the advantages'of the use p of a compression nipple as shown, for example, in'Figure .11. i i

In carrying out the present invention,

which is adaptable to ranges and ovens of any desired construction, there may be taken any suitable range comprising the usual burner manifold 2 for supplying the hot top I portionfi of the range, and having an oven structure 4 at one end. The oven may comprise the usual upper portion having "a door 9 and 10, and constituting in effect 8 in the oven compartment. This thermo:

static element, together with the valve casing used in connection therewith and to be later described, may be of any desired construction, but are convenientl of the general structure disclosed in our fatent No. 1,455,- 663 of May 15, 1923. The heat responsive portion of the thermostat may be suitably secured in the oven in any desired position as by a supporting bracket 9, one end of the element being so mounted as to project outwardly through one wall of the oven in position to cooperate with the valve casing 10.

Positioned within the oven between the inner wall 11 thereof and the outer wall 12 through which the thermostat projects, is a fitting 13, herein illustrated as com rising a casting, shown more in detail in Figures 4, a double L. The fitting 13has a threaded inlet connection 14 and a threaded outlet connection 15. Threaded into the inlet 14 is one end of a pipe 16 extending upwardly between the walls 11 and 12 of the oven so as to be concealed from view, the lower'end of this pipe having suitable connection with the manifgld 2, preferably through a shut off valve 1 v The threaded outlet connection 15 has screwed thereinto a second pipe 18, preferably located similarly to the pipe 16 and having connection at its lower end to the Bunsen tube 19 which supplies the burner 7. After all of the desired connections are made, the fittin 13 may be rigidly held in place by providing a cover plate 12' and passing a suitable bolt 20 (Figure 2) through the cover plate and outer wall 12 of the oven and into the threaded lug 21 provided on the fitting 13. This forms a ri 'd mounting in which substantiall all 0 the parts are concealed, and in which the concealed parts are in position to have the valve casing applied thereto. The cover plate is illustrated in detail in Figure 4 and is adapted to be laced outside of the enameled side wall of the oven to give a finished appearance and also to permit the pipes 16 and 18 and the double L casting to besecured in place before application of the thermostat;

By reference more particularly to Figures 9 and 10 of the drawings, it will be noted that the threaded inlet 14 communicates.

nipples 23 may .be placed in each of the o nings 22 and 24, and these nipples at t eir outer ends slipped into similar openings 25 and 25' respectively in an extension 26 carried by the casing 10, the openings 25 and 25' having their axes substantially parallel to the longitudinal axis 9f the casing and substantially normal to the faces of the casing. These openings have inclined seats 27 adapted to cooperate with the tapered ends of the nipples 23 whereby when the casing 10 and the fitting 13-are drawn toward each other, tight joints for the flow of gas will be established. This drawing together of the parts may be accomplished by a drawbolt 28 passing through an opening 29 in the extension 26 and engaging the threaded opening 30 in the fitting 13. It will be apparent that this construction permits the thermostatic casing to be quickly applied and removed without the necessity of removing any portion of the permanent piping system of the oven, and at the same time it enables the use ofa piping system which is, to a large extent, concealed within the oven walls.

The valve casing 10 has a threaded projection 31 on the rear face thereof adapted to cooperate with the revolving couple or adapter 32 carrying a control handle 33 as shown, for example, in our patent referred to. -Within thecasing is a suitable seat 34 for a valve 35, the casing being provided with any desired type of bypass, not shown, and bypass controlling means 36.

Any usual form of pilot may be provided, the pilot preferably being supplied with fuel through a connection 37 (Figure 1) with the outlet of the valve 17 With the foregoing construction, it will be apparent that the operation of the thermostat Will be effective for controlling the supply of fuel from the manifold 2 to the burner 7, the pilot supply being of such nature to insure a constant flame for lighting the burner at such times as gas is again supplied by the thermostat after a period during which it has been cut off.

In some cases it may be desired to eliminate the special fitting 13 and utilize separate Us 13 as shown, for example, in Figure 5. Such US may be used with any form of 'union embodying suitable nipples 38 and a connection 39. With such aconstruction, the tightening of the connections 39 will draw the extension 26 on the valve casing 10 toward the Us until the unions are tight.

In Figure 12 there is illustrated in perspective still another form of the invention adapted to be used either in lieu of the com-.

lustrated in detail, and more or less dia- .-grammat ically, a form of connection embodying the compression nipple of Figure 11, this figure illustrating the adaptability of the connection, in questionto. diflerent systems whether embodying a thermostat or not,and whether handling gases or'liquids. In this figure there isindicated afitting 42 and a fitting-43 which it is desired to "per, whereby they are adapted to partially form their own seat and prevent leakage when suificient pressure is applied thereto.

' This pressure ma be applied in any desired "manner, as or example, by a bolt 47 extending through the connections 42 and 43 whereby they may be readily drawn to In this manner a tight connection may be'quickly established withoutthe necessity of relative rotation between theparts. This enables one part of a .system to be completely installed and another part of the system to.

be subsequently added thereto.

With all ofthe forms herein illustrated,

thereare combined the advantage of conoealed pipes, addin range, possibility 0% quick removal of the thermostat valve in case replacement thereof is necessary, and quick application -ofkthe thermostat at the point desired, thethermostat being the last part which it is necessary to apply-.- The construction also lends itself to ready removal of the thermostat to permit replacement of linings within the oven,

- thereby obviating the necessity of providing other means for theremoval of the linings as i has heretofore been required where the reto-the beauty of the i moval of the thermostat is accompanied by difficulties.

We are aware of the fact that it has here-, tofore been proposed to provide a construction having concealed pipes, but we are not aware of the use of concealed pipes with an exposed thermostatic valve casing, although pipeshidden inrear of the range have been used. This combination has been found extremely desirable, as the location of the valve casing insures quick reduction in gas temperature, both by heat conduction and radiation.

The gas passing through the pipes lfi and 18 is obviously heated, but it has been dem; onstrated that, irrespective of the temperature at which the oven. operating, the temperature within the valvehead does not exceed 310 F. This is below the point'at which organic sulphides in the gas break up into inorganic sulphides, within asafe margin, ithaving been shown that the gases can be safely handled in thismanner at temperatures below 350 y The present application is a division of ourapplication Serial No. 96,977, which has eventuate d as patent No. 1,704,487 of March 5, 1929. i

A further advantage of the present in vention arises from the fact that the user of the. range is enabled to use the cooking top burners for boiling and frying, even in the event it is necessary to remove the thermostatic valve or in theevent of failure of this valve to operate. If desired, in such cases,

use of the special double L fitting inasmuch :as such a fitting isvery shallow, permitting its usewith ovens having a relatively narrow flue space therein. Also due ,to the fact that this fitting can be'rigidlysecured place, it will be apparent that connection.

in many cases would be ;more easily made therewith than is possible with the separate elbows as shown in Figure 5.

We claim 1. A connection, comprising a air of fittings each having a tapered seat t erein', one of said'fittings having a-threaded opening therein to receive a pipe end, a nipple adapt- ,ed to cooperate at opposite ends with the Still another advantage arises from the seats of the respective fittings and form a sealed point irrespective 0% the presence or. absence of a pipe endin said opening, and

means common toboth fittings for drawingftlie fittings together in a direction substa ially parallel to the longitudinal axis oft e'nipple, the axis of said threaded opeii ing being at substantially right angles to the longitudinal axis of said nipple, one of ,said fittings comprising a valve casing.

2. A connection, comprising a pair of fittings each having a tapered seat therein, one of said fittings having a threaded opening therein toreceive a pipe end, a nip le adapted to cooperate at opposite ends with the seats of therespective fittings and form a sealed joint irrespective of the presence or absence of a pipe end in said opening, and means for drawing the fittings together in a direction substantially parallel to the longitudinal axis of the nipple," the axis of said threaded opening being at substantially right angles to the longitudinal axis of said nipple, each of said fittings being constructed to have a fluid flow therein in a direction substantially parallel to I, the axis of said nipple and in a direction substantially at right angles to the axis of said nipple, one of-said fittings comprising a valve casing.

3. A connection, comprising a pair of fittingseach having a tapered seat therein, one of said fittings having a threadedopening therein to receive a pipe end, a nipple adapted to cooperate at opposite ends with the seats of the respective fittings and form a sealed joint irrespective ofthe presence or absence of a pipe end in said opening, and means for drawing the fittings together in a direction substantially parallel to the longitudinal'axis of the nipple, the axis of said threaded opening being at substantially right angles to the lon itudinal axis of said nipple, one of said ttings comprisinga valve casing.

4. In a fuel system, a valve casing having an inlet opening and an outlet opening, said openings having substantially parallel axes and communicating with a valve chamber, a plurality of fuel supply lines' having substantially parallel axes, the axes of said lines and of said openings being at substantially right angles to each other, a plurality of connections adapted to cooperate at their opposite ends with said casing and said fuel supply lines respectively, and means for drawing said casing and fuel supply lines .one toward the other ina direction at, substantially right angles to the axes of the fuel supply lines to establish. closed flow passages between said lines and said casing throulgh said connections.

5. n a fuel system, a valve casing having an inlet opening and an outlet opening said openings having substantially parallel axes and communicatingv w1th aivalve chamber,

, a plurality of fuel supply lines havin substantially parallel axes, the ,axes o said lines and of said openings being at substantially right angles to each other, connecting means adapted to cooperate at one end with said fuel supply lines and having openings at substantially right angles to the axes ofsaid lines, sleeve members positioned in said last mentioned openings and adapted to cooperate with the inlet and outlet openings of the valve casing for effecting a seal therebetween, and means for drawing said casing and fuel supply lines one toward the other in a direction at substantially rightangles to the axes of the fuel supply lines and in line with the axes of said sleeve members to establish closed flow passages between said lines and said u casing through said sleeve members and conwith openings having axes in substantial alinement with the axes of said first mentioned openings, and means for drawing said casing and fuel supply lines together about said connecting meansin a'direction substantially parallel to the axes of said connecting means and at substantially right angles to the axes of said fuel supply lines, said fuel supply lines yielding in a direction transversely to their flow axes as required to permit all of said connecting means to seat tightly.

7. In a fuel system, a valve casing having inlet and out et openings disposed therein with substantially parallel axes, a pair of substantially parallel fuel conduits'adjacent said openings with their major axes at substantially right angles to the axes of said openings and having portions directed toward said openings with the axes of said portions constituting substantial conto receive a pipe end, means adapted to cooperate with the seats of the respective fittings and form a sealed joint therebetween irrespective of the presence or absence of a pipe end in said opening, and means for drawing the fittings together in adirection substantially normal .to the axis of said threaded opening, one of said fittings comprising a valve casing. f i

9.' A connection, comprising a pair of fittings each having a plurality of seats there in, one of said fittings having a plurality of threaded openings therein each of which is adapted to receive a pipe end, means adapted to cooperate with the seats of the respective fittings and form sealed joints therebetween irrespective of the presence or absence of pipe ends in said threaded openings, and means for drawing the fittings together in a direction substantially normal to the axes of said threaded openings, one of said fittings comprising a valve casing.

10. In a fuel system, a valve casing hav ing an inlet opening and an outlet opening, said openings having substantially parallel axes and communicatin with a valve chamber, a valve in said 0 amber effective for controlling the fluid flow between said openings, a plurality of fuel supply lines having substantially parallel axes,the axes of said lines and of said openings being at substantially right angles to each other, a plurality of connections adapted to cooperate with said casing and said fuel supply lines re spectively, and means for drawing said casing and fuel supply lines one toward the other in a direction at substantiall right angles to the axes of the fuel supply ines to establish closed flow passages between said lines and said casing through said connections.

11. In a fuel system, a valve casing having an inlet opening and an outlet opening, said opening having substantially parallel axes and communicating with a valve chamber, a valve in said chamber effective for controllin the fluid fiow between said openings, a p urality of fuel supply lines having substantially parallel axes, the axes of said lines and said openings being at substantially right angles to each other, connectin means adapted to cooperate at one end with said fuel supply lines and having openings at substantially right angles to the axes of said lines, means cooperating with said last-mentioned openings and the inlet and outlet openings of the valve casing for effecting a seal therebetween, and means for drawing said casing and fuel supply lines one toward the other in a direction at substantially right angles to the axes of the fuel supply lines to establish closed flow passages between said lines and said casing.

12. In a fuel system, a-valve casing having a valve therein with an inlet and an outlet opening in the casing communicating with the space on opposite sides of the valve, the axes of said openings being in substantially parallel relationship, a plurality of fuel supply lines having their axes at substantially right angles to the axes of said openings, said fuelsupply lines having connecting means cooperating therewith with openings having axes in substantial alinementwith the axes of said first-mentioned openings, and means for drawing said cas-- ing and fuel supply lines together through .sa1d connecting means in a direction sub- N stantially parallel to theaxesof said open- CERTIFICATE OF CORRECTION.

Patent No. 1,912,727. June 6, 1933.

FREDERICK w; ROBERTSHAW, ET AL.

It is hereby. certified that error appears in the printed specification of the above numbered patent requiring correction as follows: Page 3, line 124, claim 1, for "point" read'l'joint"; page5, line 35, claim 11, for "opening" read "01) enings"; and that the said Letters Patent should be read with these corrections thereinthat the same may conform to the record of the case in the Patent Office.

Signed andrsealed this 18th day of July, A. D. 1933.

M. J. Moore.

(Seal). Acting Commissioner of Patents. 

